Vindow lock



W. M. LOWTHORP.

WINDOW LOCK. APPLICATION FILED JAN. 11. 1922.

Patented July 25, 1922.

WILLIAM MARCUS L'ov Hoar; OFISUMMERTOWN, 'rnmnnssnn;

VINDOW LOCK.

Spar

To all 10 7mm it may concern Be it known that I, VJILLIAM Low'rnonr, acitizen of the United residing at Summertown, in the co Lawrence andState of Tennessee, l LVB invented a new and useful lVindow 1 wk, ofwhich the following is a specificath 1.

This invention aims to provide a simple means whereby a window or thelike nay be held at adjusted heights, it being. to raise the window, tolower the wir. hold the window at any desired he be moved upwardly whendesired, lock the window, so that the same cannot be moved eitherupwardly or down zardly. Another object of the invention is 0 provide adevice of the class described which will possess great strength, and l awell adapted to withstand the efforts of )ersons seeking to raise thewindow with fe onious intent.

It is within the province of the dis closure to improve generally and toenhai ce the utility of devices of that type to wl? ch the inventionappertains.

lVith the above and other objects 5 1 View, which will appear as thedescriptn 11 proceeds, the invention resides in the c( mbination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood tha' with in the scope ofWhat is claimed, cha iges in the precise embodiment of the in entionshown can be made without departii g from the spirit of the invention.

In the accompanying drawings Figure 1 shows in elevation, a dev ceconstructed in accordance with the invention, parts being in section;Figure 2 is longitudinal section taken through the guide which carriesthe locking bolt; and Figure 3 is a section on the line 33 of Figure 1.

The numeral 1 marks a window frame, the numeral 2 designating a windowsash carrying a pane 3. A rack strip 4,- preferably Linens States, ntyof low, to

'made of metal is secured at 5 to the frame hold the guide or. the sash2. In the guide 8 a T-shaped slot 11 is formed, the slot including abody 12 extended transversely of the guide, and a head 14 extendedlongitusation of Letters Patent.

ossible ght, to- 1nd to Patented July i922.

nuary 11, 1922. Serial No. 528,391.

dinally of the guide, the body portion 12 of the slot having an arm 15extended longitudinally of the guide-and opening through the inner endthereof, as clearly shown in Figure 1. Ac bolt 16 is mounted forreciprocation in the guide 8 and has a stud 17 pro vided with a fingerpiece 18 of any desired kind. The stud 17 extends outwardly through theslot 11 in the guide 8 and is adapted to operate therein as hereinafterdescribed. Atits outer end, the bolt 16 terminates in a tip 19 havinga=beveled extremity, and provided with parallel sides 21. A compressionspring. 22 is located in the guide 8 and is interposed between the endof the bolt 16 and the end of the guide.

When the parts are arranged as shown in Figure 1, the bolt 16 isadvanced by the spring 22 until the stud 17 abuts against the casing 8at the outer end of the head it of the slot 11, the beveled end 20 ofthe tip 19 of the bolt being so positioned with respect to the seat 6that, when the sash 2 is raised, the bolt 16 will slide to the right(Figure 1) and permit a raising of the sash. The tip of the boltcooperates with the seat 6 in such a way that, as will be evident fromFigure 1, the window sash 2 cannot be low ered until the bolt 16 ismoved to the right, the stud 17 retiring into the right hand end of thehead 14 of the slot 11. WVhen the parts are arranged as shown in Figure1, the window sash 2 is held releasably against downward movement, butis free for upward movement. 1

Through the instrumentality of the stud 17, the bolt 16 may be given aquarter turn, the stud 17 traversing the body 12 of the slot 11 andmoving into the arm 15 of the slot. Under such circumstances, theparallel sides 21 of the bolt cooperate with the parallel portions 7 ofthe seat 6, and, then, the window sash 2 is locked positively againstmovement either upwardly or downwardly. Since the arm 15 of the slotextends through one end of the guide 8, the bolt 16 may be inserted intothe guide, the stud 17 entering through the arm 15 of the slot.

It is to be observed that the guide 8 includes a thickened portion 25,wherein the major portion of the slot 11 is located. Owing to the factthat the guide is thickened as at 25, the guide is not materiallyweakened by the formation of the slot. The flanges 9, further, arecarried by the aforesaid thickened portion 25 of the guide and thestrength of the device is enhanced, so far as the attachment of theguide to the window sash is concerned.

l/Vhat is claimed is l 1. The combination with a frame and a slidablesash, of a rack strip on the frame and having a seat provided withparallel portions; a guide on the sash and having a T-shaped slotincluding a transverse body, a longitudinal head at one end of the bodyand a transverse arm at the other end of the body; a bolt slidable inthe guide, and a stud projecting from the bolt, the bolt c0- operatingwith one of the parallel portions of the seat to hold the sash againstdownward movement and the bolt having a beveled end which is sopositioned with respect to the other parallel portion of the seat thatthe sash may be raised when the stud is at one end of the head of theslot, the stud being movable to the other end of the head of the slot topermit a lowering of the sash, the bolt having parallel surfaces, andbeing rotatable to permit said surfaces to coact with the parallelportions of the seat there by to hold the sash against upward movementand downward movement, the stud being adapted to enter the extension ofthe slot by way of the body of the slot, thereby to hold the boltagainst rotation; and spring means inthe guide for advancing the bolt.

2. A device of the class described, constructed as set forth in claim 1,and further characterized by the fact that the extension of the slotopens through one end of the guide.

3. A device of the class described, constructed as set forth in claim 1,and further characterized by the fact that the guide includes athickened portion wherein the major part of the slot is located, saidthickened portion carrying flanges whereby the guide is attached to thesash.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of a witness.

WILLIAM MARCUS LOIVTIIORP.

Witness:

ERNEST WRIGHT.

